“This is the most frictionless an experience can get,” said CEO Andrew Friday. “There’s no download, it’s hooked up to a fast messaging medium that you’re already using and people can bring their friends into the experience seamlessly.”

Friday was a senior product manager for chat games at Zynga, while his co-founder Andrew N. Green was previously the head of business operations at TinyCo. They plan to release their first game for Facebook Messenger later this year, and then a WeChat title in early 2019.

When I asked if there are any specific genres that will do best on messaging, Friday suggested that there’s actually “an embarrassment of riches.”

“Most great mobile game genres, and game genres in general, are good for the platform,” he said. “It’s just that if you try to just port those designs to the platform, it’s not going to work. If you rethink or reimagine these mechanics, how they would work best, how they would be most fun on the platform, there are so many genres that can work on chat.”

He also suggested that compared to FRVR, another recently funded startup looking to build chat games, Knock Knock is less focused on “hypercasual” games and instead taking “a deeper, more thoughtful approach.” Although thoughtfulness and depth are relative — Friday suggested that Knock Knock could still create the initial versions of its games in 90 days.

The funding was led by Raine Ventures, with participation from London Venture Partners, Ludlow Ventures and Gregory Milken.

“Knock Knock has the potential to usher in the next wave of chat games that will redefine the market,” said Courtney Favreau, a venture capital partner at Raine, in the funding announcement. “The founding team has an impressive track record in the mobile and chat gaming spaces and we’re very excited to help them bring their vision to life.”